The Experts below are selected from a list of 12525 Experts worldwide ranked by ideXlab platform
Akira Sakai - One of the best experts on this subject based on the ideXlab platform.
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External Radiation Dose obesity and risk of childhood thyroid cancer after the fukushima daiichi nuclear power plant accident the fukushima health management survey
Epidemiology, 2019Co-Authors: Tetsuya Ohira, Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Hideto Takahashi, Sanae Midorikawa, Satoru Suzuki, Hiroki Shimura, Takashi Matsuzuka, Akira SakaiAbstract:Background:The 2011 Great East Japan Earthquake led to a nuclear accident at Fukushima Daiichi Nuclear Power Plant. This study examines the associations of Radiation Dose and lifestyle factors with incidence of thyroid cancer in Fukushima.Methods:We designed a prospective study with 300,473 particip
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comparison of childhood thyroid cancer prevalence among 3 areas based on External Radiation Dose after the fukushima daiichi nuclear power plant accident the fukushima health management survey
Medicine, 2016Co-Authors: Tetsuya Ohira, Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Hideto Takahashi, Sanae Midorikawa, Satoru Suzuki, Toshihiko Fukushima, Hiroki Shimura, Akira SakaiAbstract:The 2011 Great East Japan Earthquake led to a subsequent nuclear accident at the Fukushima Daiichi Nuclear Power Plant. In its wake, we sought to examine the association between External Radiation Dose and thyroid cancer in Fukushima Prefecture. We applied a cross-sectional study design with 300,476 participants aged 18 years and younger who underwent thyroid examinations between October 2011 and June 2015. Areas within Fukushima Prefecture were divided into three groups based on individual External Doses (≥1% of 5 mSv, <99% of 1 mSv/y, and the other). The odds ratios (ORs) and 95% confidence intervals of thyroid cancer for all areas, with the lowest Dose area as reference, were calculated using logistic regression models adjusted for age and sex. Furthermore, the ORs of thyroid cancer for individual External Doses of 1 mSv or more and 2 mSv or more, with the External Dose less than 1 mSv as reference, were calculated. Prevalence of thyroid cancer for the location groups were 48/100,000 for the highest Dose area, 36/100,000 for the middle Dose area, and 41/100,000 for the lowest Dose area. Compared with the lowest Dose area, age-, and sex-adjusted ORs (95% confidence intervals) for the highest-Dose and middle-Dose areas were 1.49 (0.36–6.23) and 1.00 (0.67–1.50), respectively. The duration between accident and thyroid examination was not associated with thyroid cancer prevalence. There were no significant associations between individual External Doses and prevalence of thyroid cancer. External Radiation Dose was not associated with thyroid cancer prevalence among Fukushima children within the first 4 years after the nuclear accident.
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an influential factor for External Radiation Dose estimation for residents after the fukushima daiichi nuclear power plant accident time spent outdoors for residents in iitate village
Journal of Radiological Protection, 2016Co-Authors: Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Akira Sakai, Keiichi Akahane, Shunsuke Yonai, Ritsu Sakata, Kotaro Ozasa, Masayuki Hayashi, Tetsuya OhiraAbstract:Many studies have been conducted on Radiation Doses to residents after the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. Time spent outdoors is an influential factor for External Dose estimation. Since little information was available on actual time spent outdoors for residents, different values of average time spent outdoors per day have been used in Dose estimation studies on the FDNPP accident. The most conservative value of 24 h was sometimes used, while 2.4 h was adopted for indoor workers in the UNSCEAR 2013 report. Fukushima Medical University has been estimating individual External Doses received by residents as a part of the Fukushima Health Management Survey by collecting information on the records of moves and activities (the Basic Survey) after the accident from each resident. In the present study, these records were analyzed to estimate an average time spent outdoors per day. As an example, in Iitate Village, its arithmetic mean was 2.08 h (95% CI: 1.64-2.51) for a total of 170 persons selected from respondents to the Basic Survey. This is a much smaller value than commonly assumed. When 2.08 h is used for the External Dose estimation, the Dose is about 25% (23-26% when using the above 95% CI) less compared with the Dose estimated for the commonly used value of 8 h.
Tetsuya Ohira - One of the best experts on this subject based on the ideXlab platform.
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External Radiation Dose obesity and risk of childhood thyroid cancer after the fukushima daiichi nuclear power plant accident the fukushima health management survey
Epidemiology, 2019Co-Authors: Tetsuya Ohira, Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Hideto Takahashi, Sanae Midorikawa, Satoru Suzuki, Hiroki Shimura, Takashi Matsuzuka, Akira SakaiAbstract:Background:The 2011 Great East Japan Earthquake led to a nuclear accident at Fukushima Daiichi Nuclear Power Plant. This study examines the associations of Radiation Dose and lifestyle factors with incidence of thyroid cancer in Fukushima.Methods:We designed a prospective study with 300,473 particip
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comparison of childhood thyroid cancer prevalence among 3 areas based on External Radiation Dose after the fukushima daiichi nuclear power plant accident the fukushima health management survey
Medicine, 2016Co-Authors: Tetsuya Ohira, Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Hideto Takahashi, Sanae Midorikawa, Satoru Suzuki, Toshihiko Fukushima, Hiroki Shimura, Akira SakaiAbstract:The 2011 Great East Japan Earthquake led to a subsequent nuclear accident at the Fukushima Daiichi Nuclear Power Plant. In its wake, we sought to examine the association between External Radiation Dose and thyroid cancer in Fukushima Prefecture. We applied a cross-sectional study design with 300,476 participants aged 18 years and younger who underwent thyroid examinations between October 2011 and June 2015. Areas within Fukushima Prefecture were divided into three groups based on individual External Doses (≥1% of 5 mSv, <99% of 1 mSv/y, and the other). The odds ratios (ORs) and 95% confidence intervals of thyroid cancer for all areas, with the lowest Dose area as reference, were calculated using logistic regression models adjusted for age and sex. Furthermore, the ORs of thyroid cancer for individual External Doses of 1 mSv or more and 2 mSv or more, with the External Dose less than 1 mSv as reference, were calculated. Prevalence of thyroid cancer for the location groups were 48/100,000 for the highest Dose area, 36/100,000 for the middle Dose area, and 41/100,000 for the lowest Dose area. Compared with the lowest Dose area, age-, and sex-adjusted ORs (95% confidence intervals) for the highest-Dose and middle-Dose areas were 1.49 (0.36–6.23) and 1.00 (0.67–1.50), respectively. The duration between accident and thyroid examination was not associated with thyroid cancer prevalence. There were no significant associations between individual External Doses and prevalence of thyroid cancer. External Radiation Dose was not associated with thyroid cancer prevalence among Fukushima children within the first 4 years after the nuclear accident.
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an influential factor for External Radiation Dose estimation for residents after the fukushima daiichi nuclear power plant accident time spent outdoors for residents in iitate village
Journal of Radiological Protection, 2016Co-Authors: Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Akira Sakai, Keiichi Akahane, Shunsuke Yonai, Ritsu Sakata, Kotaro Ozasa, Masayuki Hayashi, Tetsuya OhiraAbstract:Many studies have been conducted on Radiation Doses to residents after the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. Time spent outdoors is an influential factor for External Dose estimation. Since little information was available on actual time spent outdoors for residents, different values of average time spent outdoors per day have been used in Dose estimation studies on the FDNPP accident. The most conservative value of 24 h was sometimes used, while 2.4 h was adopted for indoor workers in the UNSCEAR 2013 report. Fukushima Medical University has been estimating individual External Doses received by residents as a part of the Fukushima Health Management Survey by collecting information on the records of moves and activities (the Basic Survey) after the accident from each resident. In the present study, these records were analyzed to estimate an average time spent outdoors per day. As an example, in Iitate Village, its arithmetic mean was 2.08 h (95% CI: 1.64-2.51) for a total of 170 persons selected from respondents to the Basic Survey. This is a much smaller value than commonly assumed. When 2.08 h is used for the External Dose estimation, the Dose is about 25% (23-26% when using the above 95% CI) less compared with the Dose estimated for the commonly used value of 8 h.
Tetsuo Ishikawa - One of the best experts on this subject based on the ideXlab platform.
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External Radiation Dose obesity and risk of childhood thyroid cancer after the fukushima daiichi nuclear power plant accident the fukushima health management survey
Epidemiology, 2019Co-Authors: Tetsuya Ohira, Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Hideto Takahashi, Sanae Midorikawa, Satoru Suzuki, Hiroki Shimura, Takashi Matsuzuka, Akira SakaiAbstract:Background:The 2011 Great East Japan Earthquake led to a nuclear accident at Fukushima Daiichi Nuclear Power Plant. This study examines the associations of Radiation Dose and lifestyle factors with incidence of thyroid cancer in Fukushima.Methods:We designed a prospective study with 300,473 particip
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comparison of childhood thyroid cancer prevalence among 3 areas based on External Radiation Dose after the fukushima daiichi nuclear power plant accident the fukushima health management survey
Medicine, 2016Co-Authors: Tetsuya Ohira, Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Hideto Takahashi, Sanae Midorikawa, Satoru Suzuki, Toshihiko Fukushima, Hiroki Shimura, Akira SakaiAbstract:The 2011 Great East Japan Earthquake led to a subsequent nuclear accident at the Fukushima Daiichi Nuclear Power Plant. In its wake, we sought to examine the association between External Radiation Dose and thyroid cancer in Fukushima Prefecture. We applied a cross-sectional study design with 300,476 participants aged 18 years and younger who underwent thyroid examinations between October 2011 and June 2015. Areas within Fukushima Prefecture were divided into three groups based on individual External Doses (≥1% of 5 mSv, <99% of 1 mSv/y, and the other). The odds ratios (ORs) and 95% confidence intervals of thyroid cancer for all areas, with the lowest Dose area as reference, were calculated using logistic regression models adjusted for age and sex. Furthermore, the ORs of thyroid cancer for individual External Doses of 1 mSv or more and 2 mSv or more, with the External Dose less than 1 mSv as reference, were calculated. Prevalence of thyroid cancer for the location groups were 48/100,000 for the highest Dose area, 36/100,000 for the middle Dose area, and 41/100,000 for the lowest Dose area. Compared with the lowest Dose area, age-, and sex-adjusted ORs (95% confidence intervals) for the highest-Dose and middle-Dose areas were 1.49 (0.36–6.23) and 1.00 (0.67–1.50), respectively. The duration between accident and thyroid examination was not associated with thyroid cancer prevalence. There were no significant associations between individual External Doses and prevalence of thyroid cancer. External Radiation Dose was not associated with thyroid cancer prevalence among Fukushima children within the first 4 years after the nuclear accident.
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an influential factor for External Radiation Dose estimation for residents after the fukushima daiichi nuclear power plant accident time spent outdoors for residents in iitate village
Journal of Radiological Protection, 2016Co-Authors: Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Akira Sakai, Keiichi Akahane, Shunsuke Yonai, Ritsu Sakata, Kotaro Ozasa, Masayuki Hayashi, Tetsuya OhiraAbstract:Many studies have been conducted on Radiation Doses to residents after the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. Time spent outdoors is an influential factor for External Dose estimation. Since little information was available on actual time spent outdoors for residents, different values of average time spent outdoors per day have been used in Dose estimation studies on the FDNPP accident. The most conservative value of 24 h was sometimes used, while 2.4 h was adopted for indoor workers in the UNSCEAR 2013 report. Fukushima Medical University has been estimating individual External Doses received by residents as a part of the Fukushima Health Management Survey by collecting information on the records of moves and activities (the Basic Survey) after the accident from each resident. In the present study, these records were analyzed to estimate an average time spent outdoors per day. As an example, in Iitate Village, its arithmetic mean was 2.08 h (95% CI: 1.64-2.51) for a total of 170 persons selected from respondents to the Basic Survey. This is a much smaller value than commonly assumed. When 2.08 h is used for the External Dose estimation, the Dose is about 25% (23-26% when using the above 95% CI) less compared with the Dose estimated for the commonly used value of 8 h.
Seiji Yasumura - One of the best experts on this subject based on the ideXlab platform.
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External Radiation Dose obesity and risk of childhood thyroid cancer after the fukushima daiichi nuclear power plant accident the fukushima health management survey
Epidemiology, 2019Co-Authors: Tetsuya Ohira, Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Hideto Takahashi, Sanae Midorikawa, Satoru Suzuki, Hiroki Shimura, Takashi Matsuzuka, Akira SakaiAbstract:Background:The 2011 Great East Japan Earthquake led to a nuclear accident at Fukushima Daiichi Nuclear Power Plant. This study examines the associations of Radiation Dose and lifestyle factors with incidence of thyroid cancer in Fukushima.Methods:We designed a prospective study with 300,473 particip
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comparison of childhood thyroid cancer prevalence among 3 areas based on External Radiation Dose after the fukushima daiichi nuclear power plant accident the fukushima health management survey
Medicine, 2016Co-Authors: Tetsuya Ohira, Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Hideto Takahashi, Sanae Midorikawa, Satoru Suzuki, Toshihiko Fukushima, Hiroki Shimura, Akira SakaiAbstract:The 2011 Great East Japan Earthquake led to a subsequent nuclear accident at the Fukushima Daiichi Nuclear Power Plant. In its wake, we sought to examine the association between External Radiation Dose and thyroid cancer in Fukushima Prefecture. We applied a cross-sectional study design with 300,476 participants aged 18 years and younger who underwent thyroid examinations between October 2011 and June 2015. Areas within Fukushima Prefecture were divided into three groups based on individual External Doses (≥1% of 5 mSv, <99% of 1 mSv/y, and the other). The odds ratios (ORs) and 95% confidence intervals of thyroid cancer for all areas, with the lowest Dose area as reference, were calculated using logistic regression models adjusted for age and sex. Furthermore, the ORs of thyroid cancer for individual External Doses of 1 mSv or more and 2 mSv or more, with the External Dose less than 1 mSv as reference, were calculated. Prevalence of thyroid cancer for the location groups were 48/100,000 for the highest Dose area, 36/100,000 for the middle Dose area, and 41/100,000 for the lowest Dose area. Compared with the lowest Dose area, age-, and sex-adjusted ORs (95% confidence intervals) for the highest-Dose and middle-Dose areas were 1.49 (0.36–6.23) and 1.00 (0.67–1.50), respectively. The duration between accident and thyroid examination was not associated with thyroid cancer prevalence. There were no significant associations between individual External Doses and prevalence of thyroid cancer. External Radiation Dose was not associated with thyroid cancer prevalence among Fukushima children within the first 4 years after the nuclear accident.
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an influential factor for External Radiation Dose estimation for residents after the fukushima daiichi nuclear power plant accident time spent outdoors for residents in iitate village
Journal of Radiological Protection, 2016Co-Authors: Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Akira Sakai, Keiichi Akahane, Shunsuke Yonai, Ritsu Sakata, Kotaro Ozasa, Masayuki Hayashi, Tetsuya OhiraAbstract:Many studies have been conducted on Radiation Doses to residents after the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. Time spent outdoors is an influential factor for External Dose estimation. Since little information was available on actual time spent outdoors for residents, different values of average time spent outdoors per day have been used in Dose estimation studies on the FDNPP accident. The most conservative value of 24 h was sometimes used, while 2.4 h was adopted for indoor workers in the UNSCEAR 2013 report. Fukushima Medical University has been estimating individual External Doses received by residents as a part of the Fukushima Health Management Survey by collecting information on the records of moves and activities (the Basic Survey) after the accident from each resident. In the present study, these records were analyzed to estimate an average time spent outdoors per day. As an example, in Iitate Village, its arithmetic mean was 2.08 h (95% CI: 1.64-2.51) for a total of 170 persons selected from respondents to the Basic Survey. This is a much smaller value than commonly assumed. When 2.08 h is used for the External Dose estimation, the Dose is about 25% (23-26% when using the above 95% CI) less compared with the Dose estimated for the commonly used value of 8 h.
Akira Ohtsuru - One of the best experts on this subject based on the ideXlab platform.
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External Radiation Dose obesity and risk of childhood thyroid cancer after the fukushima daiichi nuclear power plant accident the fukushima health management survey
Epidemiology, 2019Co-Authors: Tetsuya Ohira, Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Hideto Takahashi, Sanae Midorikawa, Satoru Suzuki, Hiroki Shimura, Takashi Matsuzuka, Akira SakaiAbstract:Background:The 2011 Great East Japan Earthquake led to a nuclear accident at Fukushima Daiichi Nuclear Power Plant. This study examines the associations of Radiation Dose and lifestyle factors with incidence of thyroid cancer in Fukushima.Methods:We designed a prospective study with 300,473 particip
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comparison of childhood thyroid cancer prevalence among 3 areas based on External Radiation Dose after the fukushima daiichi nuclear power plant accident the fukushima health management survey
Medicine, 2016Co-Authors: Tetsuya Ohira, Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Hideto Takahashi, Sanae Midorikawa, Satoru Suzuki, Toshihiko Fukushima, Hiroki Shimura, Akira SakaiAbstract:The 2011 Great East Japan Earthquake led to a subsequent nuclear accident at the Fukushima Daiichi Nuclear Power Plant. In its wake, we sought to examine the association between External Radiation Dose and thyroid cancer in Fukushima Prefecture. We applied a cross-sectional study design with 300,476 participants aged 18 years and younger who underwent thyroid examinations between October 2011 and June 2015. Areas within Fukushima Prefecture were divided into three groups based on individual External Doses (≥1% of 5 mSv, <99% of 1 mSv/y, and the other). The odds ratios (ORs) and 95% confidence intervals of thyroid cancer for all areas, with the lowest Dose area as reference, were calculated using logistic regression models adjusted for age and sex. Furthermore, the ORs of thyroid cancer for individual External Doses of 1 mSv or more and 2 mSv or more, with the External Dose less than 1 mSv as reference, were calculated. Prevalence of thyroid cancer for the location groups were 48/100,000 for the highest Dose area, 36/100,000 for the middle Dose area, and 41/100,000 for the lowest Dose area. Compared with the lowest Dose area, age-, and sex-adjusted ORs (95% confidence intervals) for the highest-Dose and middle-Dose areas were 1.49 (0.36–6.23) and 1.00 (0.67–1.50), respectively. The duration between accident and thyroid examination was not associated with thyroid cancer prevalence. There were no significant associations between individual External Doses and prevalence of thyroid cancer. External Radiation Dose was not associated with thyroid cancer prevalence among Fukushima children within the first 4 years after the nuclear accident.
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an influential factor for External Radiation Dose estimation for residents after the fukushima daiichi nuclear power plant accident time spent outdoors for residents in iitate village
Journal of Radiological Protection, 2016Co-Authors: Tetsuo Ishikawa, Seiji Yasumura, Akira Ohtsuru, Akira Sakai, Keiichi Akahane, Shunsuke Yonai, Ritsu Sakata, Kotaro Ozasa, Masayuki Hayashi, Tetsuya OhiraAbstract:Many studies have been conducted on Radiation Doses to residents after the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. Time spent outdoors is an influential factor for External Dose estimation. Since little information was available on actual time spent outdoors for residents, different values of average time spent outdoors per day have been used in Dose estimation studies on the FDNPP accident. The most conservative value of 24 h was sometimes used, while 2.4 h was adopted for indoor workers in the UNSCEAR 2013 report. Fukushima Medical University has been estimating individual External Doses received by residents as a part of the Fukushima Health Management Survey by collecting information on the records of moves and activities (the Basic Survey) after the accident from each resident. In the present study, these records were analyzed to estimate an average time spent outdoors per day. As an example, in Iitate Village, its arithmetic mean was 2.08 h (95% CI: 1.64-2.51) for a total of 170 persons selected from respondents to the Basic Survey. This is a much smaller value than commonly assumed. When 2.08 h is used for the External Dose estimation, the Dose is about 25% (23-26% when using the above 95% CI) less compared with the Dose estimated for the commonly used value of 8 h.
